body,
html {
    font-size: 14px;
    height: 100%;
}

body,
html,
input[placeholder],
textarea[placeholder] {
    font-family: Source Han Sans CN, -apple-system, BlinkMacSystemFont, PingFang SC, Helvetica Neue, STHeiti, Microsoft Yahei, Tahoma, Simsun, sans-serif;
}

body {
    line-height: 1.6;
    color: #999;
}

a,
abbr,
acronym,
address,
applet,
article,
aside,
big,
blockquote,
body,
caption,
cite,
code,
dd,
del,
details,
dfn,
div,
dl,
dt,
em,
fieldset,
figcaption,
figure,
footer,
form,
h1,
h2,
h3,
h4,
h5,
h6,
header,
hgroup,
html,
iframe,
img,
ins,
kbd,
label,
legend,
li,
main,
menu,
nav,
object,
ol,
p,
input,
button,
pre,
q,
s,
samp,
section,
small,
span,
strike,
strong,
sub,
summary,
sup,
table,
tbody,
td,
tfoot,
th,
thead,
tr,
tt,
ul,
var {
    padding: 0;
    margin: 0;
    border: 0;
    outline: 0;
    list-style: none;
    vertical-align: baseline;
}

* {
    box-sizing: border-box;
}

a {
    text-decoration: none;
    color: inherit;
}
img {
    vertical-align: middle;
}
.clearfix::after {
    content: "";
    display: block;
    height: 0;
    clear: both;
    visibility: hidden;
}

.clearfix {
    *zoom: 1
}
i {
    font-style: normal;
}